不定

1. hard to say; hard to predict

♦ 事情还~怎么样呢。 It's hard to predict how things will turn out.

2. indefinite; indeterminate

~变异 [生]indeterminate variation~方程 [数]indeterminate equation~根 [植]adventitious root~冠词 [语]indefinite article~式 [语]infinitive